Hot appliance.



ciw. SPUIIR, II.

HOT APPLIANCE.

APPLICATION FILED IuLY10. 1915. REIIEWED ocr. 22. 1917.

Patented Jam. 22, 119118.

CHARLES SPURR, R., OF ROXBURY, MASSACHUSETTS.

HOT APPLIANCE.

Specification of Letters Patent.

Patented Jian., 22., 1913,

Application lec'i July 10, 19.15, Serial No. 39,067. Renewed October 22, 1917. Serial No. 198,003.

To aZZ uzom it may concern:

Beit known that CHARLES W. SPURR, J r., a citizen ot' the United States, and resident of Roxbury, in the county of Suffolk and State of' Massachusetts, has invented certain new and useful Improvements in Hot Appliances, of which the following is a specification.

This invention relates to improvements in hot appliances or Vdevices capable ot' maintaining constant temperatures for therapeutic use, through the medium of heated, cireulating water, with means for varying the temperature by regulation ot' the source of heat.

My present improvements comprise, in an apparatus otl the character indicated, wherein a heat flame is governed by a sliding sleeve, the employment of' means whereby said sleeve is positively held in the positions to which set i'or the performance ofl its function, also ot' means for shielding the flame from the extinguishing action otl air currents.

Other features of the invention include means for facilitating the flow of' the circulating heated water through the apparatus, and means tor generally improving its operation.

ln the drawing:

Figure 1 is an elevation of my improved apparatus.

Fig. 2 is a plan view of a hot appliance, and

lfig. 3 is a horizontal section on the line 3-3 ot' Fig. 1.

rl`he apparatus to which my improvements refer comprises a spirit lamp 1, which serves as a base or support for the superstructure ot' a water heating device, and has a perforated burner tube :2, containing which, together with a sliding sleeve 3. adapted to cover and uncover the perforations in said burner tube, to vary the size of the fiarne.

A water container, composed ot' the superposed vessels 4, 5, is supported upon the lamp 1, as by legs G, which are adapted, by t'eet 7, to be disengagingly held by a socket 8 and spring clip 9 upon the upper surface ot' said lamp.

The vessels 4, 5 are connected by a tube 10, whose opposite, open ends, respectively, are exposed within said vessels; circulation of heated water occurring through a twin tube l1, whose opposite ends connect, respectively, with said vessels 1, 5, as at l2, 13.,

A vertically moving dome 14, in the upper vessel 5, is adapted to rise with the expansion ot' the heated air therein, and to tall again with the cooling and contraction ot the air therein, and, by means ot a connection between said dome and the sliding sleeve 3, to thereby govern the extent of the burner flame.

This connecting means comprises a twopart rod 15, hinged at 16, where it has a depending pin or stud 17, that is seated in an orifice in the top of the dome, to localize it, the two arms of said rod 15 extending downwardly, outside the water container, and being inwardly bent at their lower ends, where they are provided with bifurcations, or yoke-like portions 18, which straddle the sleeve 3, at opposite sides thereof'. Said sleeve 3 has an annular flange 19, which bears upon the rod portions 18, whereby, as the rod 15 rises with the upward movement of dome 14, the sleeve 3 also rises and thus tends to diminish the size of the iiame. The two-part formation of rod 15, and its arrangement at opposite sides ot the water container, avoids the creation of any tendency toward frictional binding of the dome 14 in its vertical movement within vessel 5, and also insures non-binding vertical movement of' the sleeve 3 upon the burner tube, by means ot the engagement of the twopart rod 15 at opposite sides beneath the flange 19.

The sleeve 3, in addition to its automatic operation in the manner described, is also manually controllable, so that the extent of the flame may be determined and set when it is desired to limit the degree to which the i water is to be heated. This is accomplished by the employment ot a verticallybowed lever 20, having an arm 21 bent at right angles thereto, and trictionally pivoted in a strap bearing 29 upon the lamp 1, with an operating handle 23. The upper surface of lever 2O is serrated or formed as a rack, and is adapted to bear against the under surface of liange 19, which latter is prov'ded with corrugations 24, or is otherwise roughened or rendered frictionally engaging. in order that, with the elevation of the lever 20 to a desired height, carrying the flange 39 therewith, the sleeve 3 may thereby be positively retained in the position to which set.

A removable guard or shield. as 95, is orovided to surround the burner space between the lamp and 'water container, te prevent the Haine from being influenced by ir currents, which would otherwise impair its heat efii.- niency. Said guard 1s 1n the form of a two Vpart cylinder 26, hinged as at 27, and; naving fastening means, as 28, at its free ends.

Orifices, as at 29, may be provided in said;

guard, to supply air for combustion.

The guard 26 is supported at its lower edge upon an annular shoulder 30 `Formed about the lamp, and said guard, at its upper end, has an` inwardly directed, annular flange 31, whereby it makes fitting engage- 'ment within a concentric groove 32 proupon and secured to a rubber mat 33,10

thereby serve as a hot appliance or pad. The free portion of the tubing 11.. to avoid kinking in its length between the mat and the water container, has its outgoing 1nd return portions connected together by a web, as 34, by which means the liability of the separate tube portions to kink and thus retard or. stop Athe circulation therethrough is greatly.V diminished. A

Variations may be Vresorted to Within the spirit and scope oic my invention, and parts .thereof used without others.

In a hot appliance, the combination with a water circulatingzcontainer, a supporting lamp having a burner tube, and a liexible twin-tube connecting witha heating pad, of an expansion dome, having anorice, 'a sliding sleeve upon the burner-tube toregulate the flame, a llangeupon said sleeve, and

hinged rod with a stud seated'in saidY dome orifice, said rod having arms depending at opposite sides ofv the water circulatingV con tainer, and said arms having vinwardly directed, yoke-likeends, to straddle said sleeve and bear upwardly against said flange, to

" communicate the movement of said dome to said sleeve.

Signed at Roxbury, in the county` of Suffolk and State of Massachusetts., this 23d day of March, A. D, 1915. l

CHARLES W.

Witnesses: Y n

WHEATON; Krirnnoen, JAMES P. CLEARY, Jr.V

SPURR, Je.

copie: o! this patent may be obtainedfor .five cents each, byr addressingl the Commissioner et Patents,

Washington, D. C. i 

